Multi Testers Indoor Air Quality Detector Accurate Testing Formaldehyde(HCHO) Monitor with TEMP/HUM/AQI/TVOC Test Handheld Air Quality Meter for Car Outdoor Detection

Update: so I been in an area where there was so2 levels and even with the ac one and windows up in my car as I passed through a sulfur zone, the gassed were in my car. I had the device on for a while and it could read the so2 levels in my car. After passing the areas and the smell went away in my car the air levels were good. I’d say this device is greatSeems accurate. Just can’t change the function from Celsius to farenheit. It’s pretty light. Very good, just pricy :(I am measuring the air quality where I go for my kids because we live in Hawaii where there is so2. I have yet to test it where there is so2 in the air. But so far it can detect good air. Also the humidity at my dads house is way less and at my sisters house it’s a lot more, which is expected so I would say it is accurate.

The chinglish instructions are VERY poor. The meter does not give believable readings but it may need calibration. Instructions discuss calibration but there is no stated requirement to calibrate. And the calibration instructions are hard to understand. At any rate, it should have been calibrated at the factory.

It’s ok don’t know Celsius or what the frormyldahide readings should be or the safe reading

The unit I received was not in English and I don’t read Chinese or whatever it is. Was absolutely no use for me. Could not find how to change language so I returned.

This tester has Chinese as default setting made which cost lots of effort and made it difficult to use before figuring out the language option.

There's no way to change the temperature units to US (Imperial). They are in metric.This should be more prominently featured in the description of the item.

Rubbish don't waste your money

簡単に空気の状況をモニターできます。USB充電式なのは便利です。充電式で軽量なのでどこにでも持っていけます。画面も明るくて見やすいです。中国語から英語に設定を変えるのに少し苦労したのと音が消せれば言うことありません。

すぐに数字が出て、とても重宝しております。しかし、わたしの遣り方が悪いのか、どう探してもPM2.5の表示が見つからないのです。始めからPM2.5の検出は出来ないのではないかと思うのですが。間違っていたらゴメンナサイ。